相关实验视频

Updated: Jun 7, 2025

Use of Autometallography to Localize and Semi-Quantify Silver in Cetacean Tissues
07:05

Use of Autometallography to Localize and Semi-Quantify Silver in Cetacean Tissues

Published on: October 4, 2018

7.2K

在巴尔干硬币中追踪金联系和银的来源 (公元前5世纪至公元前1世纪)

Katrin Julia Westner1, Janne Blichert-Toft1, Liesel Gentelli1

  • 1Ecole Normale Supérieure de Lyon and CNRS, Lyon, France.

Archaeological and anthropological sciences
|November 18, 2024
PubMed
概括

同位素分析显示,古代巴尔干银币主要使用当地矿石,大马士顿可能在附近开采银. 硬币回收和区域金属采购在各种古老的币厂中很明显.

关键词:
在Ag的同位素.巴尔干半岛的巴尔干地区硬币 硬币 硬币 硬币混合 混合 混合 混合在Pb的同位素中,Pb是同位素.银 银 银 银 银 银 银

更多相关视频

Co-localizing Kelvin Probe Force Microscopy with Other Microscopies and Spectroscopies: Selected Applications in Corrosion Characterization of Alloys12:18

Co-localizing Kelvin Probe Force Microscopy with Other Microscopies and Spectroscopies: Selected Applications in Corrosion Characterization of Alloys

Published on: June 27, 2022

2.6K
Dendrochronological Dating and Provenancing of String Instruments10:26

Dendrochronological Dating and Provenancing of String Instruments

Published on: October 6, 2022

2.4K

相关概念视频

Formation of Complex Ions03:45

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
23.4K
Bonding in Metals02:32

Bonding in Metals

Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. 
46.9K
Properties of Transition Metals02:58

Properties of Transition Metals

Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
25.1K
Metallic Solids02:37

Metallic Solids

Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.3K
Qualitative Analysis03:46

Qualitative Analysis

For solutions containing mixtures of different cations, the identity of each cation can be determined by qualitative analysis. This technique involves a series of selective precipitations with different chemical reagents, each reaction producing a characteristic precipitate for a specific group of cations. Metal ions within a group are further separated by varying the pH, heating the mixture to redissolve a precipitate, or adding other reagents to form complex ions.
For instance, group IV...
22.0K
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
343